If squad leads had 1 rally per life it would slow the game down and make rally points an actual location for a squad to gather and then move. In my opinion there should never be a constant stream of people spawning from rallies because then it’s doing a fobs job.

I had the same problem when I first got the game. When you are a new squad lead one of the easiest and the most important is to sit on the defense cap. From there you can coordinate with other SLs and support them through spawns, mortars, and repair and rearm stations. Plus it’s fairly easy to place members of the squad at chokepoints and it will teach you an idea of organizing squad members. Good luck!
and don’t be worried about being shit everybody’s starts that way and it sounds like you are already trying to understand coordination in the squad so you sound good to me. Keep picking up squad lead you’ll get better it just takes practice.